ULYSSES, KS, USA
N1021Y
HILLER UH-12B
THE PLT MADE AN AUTOROTATIVE PRECAUTIONARY LANDING AFTER FEELING VIBRATIONS IN THE ANTI-TORQUE PEDALS. THE ACFT WAS TURNED INTO THE WIND BUT LANDED HARD IN A FIELD. THE PLT UPON EXITING THE ACFT FOUND THE ANTI-TORQUE ROTOR AND GEARBOX MISSING. THEY WERE FOUND 100 YARDS AWAY, BACK ALONG THE FLT PATH. ANALYSIS OF THE FAILED PARTS REVEALED AN AREA OF FATIGUE IN THE ATTACHMENT FITTINGS OF THE ANTI-TORQUE ROTOR AND GEARBOX.
Source: NTSB Aviation Accident Database
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